Doorcheck



June 26, 1928. 1,674,756

G. H. WUCHERT DOORCHECK Filed Oct. 2, 1926 3 Sheets-Sheet l VEN TOR.

A TTORNEYS.

June 26, 1928.

G. H. WUCHERT nooncnscx Filed Oct. 2, 1926 s Sheets-Sheet 2 IN V EN TOR.

A TTORNEYS.

Patented June GEORGE HENRY WUGHERT, OF NEW B EITAIN, CONNECTICUT, ASSIGNOR-TO THE AMER- 101m HARDWARE CORPORATION, or NEW Bmrern-goonnnotrrour, A CORPORA- 'IION OF CONNECTICUT.

My invention devices, and has checks in which a Application filed October 2, 1926.

relates to checks or retarding special reference to door liquid 18 employed m a cylinder to check the closing ofthe door.

One of the objects provide a device novel and improved of this character in which means are employed for re ulatin the checkin action thereof.

Another obj ect vide a door check easily controlled checked 'anywher substantially 60- the door so as to entire distance; 0

degrees to the latching of the invention is to prowhich is adapted to to cause the door to e between an opening be of of close the'door slowly the r to close slowly part way.

and impart a quick action to the door at the closlng POlIlt'tO overcome a stiff spring-acting latch-bolt or isused in electric door opening; or to close quickly to within ing point and noiselessly, which doors in a hospit aplunger pressure such as afew inches of the latchthen close very slowly and movement is desirable for al.

A still further obj ect of the invention is to provide a valve operator may readily any desired adjustment the valve a distanceless controlled thereof may such a constructionpermitdial indicator whereby the determine the angular position toturn the valve to secure the'de sired adjustment.

The several features of the invention, whereby the aboveanentioned and other ob jects may stood from the following be attained, will be clearly underdescription and accompanying drawings,' in which:

Figure 1 is a longitudinal sectional elevation of a door checkembodying the features of the invention in their preferred form;

' Fig. 2 is a detail sectional view of a port-ion of the cylinder of the door check taken scale taken on on the line 22 o 1% Fig.1;

Fig. 3 is an end elevation of the lower portion of the cheek;

Fig. l is a the sectional view on 'an enlarged line E-4r of Fig. 3;

Fig. 5 is a detail view-in perspective of a bushing forming controlling valve Fig. 6 is a able member of th component part of the the door check;

a of detail side elevation 'of the-mow e controlling valve;

of the invention is to liquid is free to pass movement of the piston upon-opening the door check in I the piston. is provided tracted position; the port chamber.

- the rear end portion ,to' provide a, space noononnox.

Serial N0.;139,067.

taken on the lines .7-7, 88 and 9-9, re-

spectively, of Fig. 6; and

Figs. 10 to 16, inclusive, are detail diagrammatical views of the valve shown in seven different positions. The door check illustrated in the drawings is provided with a. casing having a piston chamber or cylinder 2, and a chamber 4 for the usual actuating spring (not shown) for the check. Apiston 6 is mounted within the cylinder and is actuated by means of a: rack 7 secured to the. rear side thereof which is operatively engaged by a pinion 8 formed on a vertical shaft 9 whichis connected with the actuating spring. The piston is provided with the usual opening 10 through which the during the retracting door, and which is closed by a ball check valve 11 during the advancing movement of the biston.

Inthe illustrated constructionthe door check casing is bored to provide a by-pass chamber 12 which extends longitudinally of the forward portion of the piston chamber. Theinnersurface of this by-pass chamber is cylindrical and its rear end ld opens intothe piston chamber at the rear side of The wall of the by-pass chamber with three ports16, 17' and 18 leading into the piston chamber at points in front of the piston when the piston is in retracted position. I The port. 18 is spaced a-slight distance from the outer or front end of the piston when the piston is in re- 17 is spaced a. distance' infront of the. port 18 so that the piston will pass by the port as itapproaches the limit of its advancing movement; and the port 16 is positioned in proximity to the outer or'front end wall of the piston A. bushing 20 is secured in'the by-pass'chamber 12 and is provided .with three ports 22', 23 and 24 that register with the ports 16, 17 and 18, respectively. This bushing has its inner or rear end closed and of its surface is bevelled 26 between the ports 18 these ports are Yin and 24 through which inner open communication with the rear or endl iof the by-passchamber 12.

iii)

A tubular valve 28 is mounted for turning movement in the bushing 20. The outer end of this valve member is closed and is provided with a stem 30 which extends through a suitable packing nut that is screwed into a boss 32 on the casing. An operating wheel or handle 33 is secured on 'the outer end of the valve stem.

the door. A dial 34 is provided on the valve operating wheel 33, and a fixed pointer 36 extends over this dial. The numbers 1 to 7 on the dial indicate seven different angular positions to which thevalve member maybe moved to effect different closing movements of the door.

When the valve is turned to position No.

1 on the dial, holes 38 and 39 (Fig. 10) in the valve coincide with ports: 23 and 24 in the bushing 20 and there is also a slight opening of a. hole 40 in the valve with port 22. A groove 42 is provided on the outside 01 the valve member connecting holes 38 and 39. )Vhen the valve is in this position during the closing of the door, as the piston advances, the liquid in the cylinder passes freely through the port 18, space 26, and out through the open end 14 of the by-pass and back into the cylinder at the rear of the piston. Also, in order to insure a free passage of the liquid at the start of the closing of the door, the inner side of the cylinder is provided with a groove 44 leading rearwardly from' the port 18 in the cylinder through which the liquid also passes. After the front end of the piston passes by the port 18, the liquid is still free to pass through the port 17 in the cylinder and back through the groove 42, and also may pass through the hole 38 in the valve and out through the valve hole 39 to the rear side of the piston. Thus the liquid passes treely to the rear of the piston during the first part of the advancing movement of the piston. )Vhen, however, the advancing end of the piston passes by the port 17, the liquid is then forced to pass through the small opening provided by the hole 40 of the valve. The free flow of the'liquid up to the time the end of the piston passes the port 17 permits the door to close within a "few inches of the latching point, after which, as the liquid is forced to pass through thesmall opening provided by the hole 40, the closing of the door is retarded. In order that the closing of the port 17 by the piston will not be so abrupt as to cause an objection valve in this position, the liquid is free to pass until the piston closes the port 23 and then all of the liquid entering the valve through the hole 40 is forced to pass out through the restricted opening provided by the valve hole 39 so that the door is retarded at this point. When, however, the rear end of the piston passes bythe port 23 which occurs when the door is closed close to the latching point, the liquid is free to pass out through the openings provided by the holes 38 and 45 as well as the hole 39, which permits the door then to close quickly. Thus when the valve is turned to position No. 2 on the dial, the doorv may close quickly part way and then will be re-. tarded until it is close tothe latching point,

' whereupon it will close quickly.

l/Vhen the valve is turned to position N o. 3 on the dial, said hole 45 v(Fig. 12) will be in alinement with by-pass port 23 ofthe valve bushing, a hole 46 will be partly open with by-pass port 24, and'the hole 40 will be open slightly more than 46. It will be apparent that this position of the valve checks the door within ten to twelve inches from closing, and then the check allows a quick closing movement of the door to latching position.

When the valve is turned to position No, 4 on the dial (Fig-13) the valve hole 46 is in alinement with the port 24, the valve hole 40 is only slightly open at the port 22, and the hole 45 presents a larger opening than hole 40. It will be apparent that this position of valve, allows a door to be checked about ten to twelve inches from the latch ing point and then will close slowly the re maining distance.

When the valve is turnedto position No. 5 on the dial (Fig. 14) a valve hole 48 is in substantial alinement with by-pass port 23, the hole 46 has a slight opening with relation to by-pass port- 24, and a hole 50 presents a slight opening to bypass port 22. This position of the valve allows the door to close quickly at the beginning of the closing movement, and to decrease in speed. to within four to six inches of the latching point, whereupon the door closes very slowly.

When the valve is turned to position No. 6 15) the valve hole 50 is in alinement with port 22, the valve hole 48 is slightly open with by-pass port 23, and a valve hole 52 is slightly open with port 24. llhis position of the valve allows a checking oithe door at a point approximately 60 degrees from the closing point. \Vhen nearthe closing point it allows the door to close quickly.

\Vhen the valve is turned to position No. 7 upon the dial (Fig. 16) the valve hole 52' is in open position with relation to by-pass port 24, Fig. 16, and also. the valve hole 50. is slightly open at by-pass port 22, the by: pass port 23 being completely closed by. the valve. lVhen the door is checked at approximately '60 degrees and then closes slowly the remaining distance.

It will be apparent that the adjustments of the valve above described and any other desired adjustments, may be accomplished by turning the valve a distance lessthan- 3 60 degrees, and because of this'i-t is practical to use a dial indicator so that the operator by merely turning the valve to any of the points marked on the dial may cause the door check to operate in whatever manner he may desire.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

WVhat I claim is:

1. A door check of the class described having, in combination, a piston, a piston chamber, a chamber having at least three ports, one in communication with the piston chamber at the rear of the piston and the other two in communication with the piston chamber in advance of the piston when the piston is in retracted position, and one of the last twomentioned ports being spaced a distance behind the other and adapted to be closed by the piston during part of its advancing movement, and a single valve member for controlling all of said ports with relation to each other.

2. A door check of the class described having, in combination, a piston, a piston chamber, a chamber having at least three ports, one in communication with the piston chamber at the rear of the piston and the other two in communication with the piston chamber in advance of the piston when the piston is in retracted position, and one of the last two mentioned ports being spaced a distance behind the other and adapted to be closed by the piston during part of its advancing movement, and means for controlling all of said ports independently of each other.

3. A door check of the class described having, in combination, a casing having a piston chamber and a by-pass chamber through which the liquid passes during the advancing movement of the piston, a piston the valve. is in this position positioned withinsaid piston chamber, and. means for regulating the flow of liquid through sai l by-pass chamber compr-islngi'a valve cham-v her having a plurality of ports, and a tubular valve member mounted to turn in said valve chamber and having a plurality of series of holes corresponding in positionto.

the ports in said chamber, respectively, the holes in eachseries-kbeing adapted to be successively positioned in alinement with the correspondingport in the valve chamber by passes during the advancing movement of'..

the piston, and means for regulating the flowof liquid through ing a tubular valve member mounted in the chamber and having a plurality of holes adapted to be positioned in alinement with said ports, respectively, by turning said valve member, said holes being differently with relation to each other than said ports so as to permit said valve memher to be turned to cause said holes therein to present openings of diflerent sizes to said ports.

5. A door check of the class described having, in combination, a piston, a piston chamber, a bypass chamber having a plurality of ports through which the liquid passes during the advancing movement of the piston, and a longitudinally fixed rotatable valve member for controlling all of said ports with relation to each other.

6. A door check of the class described having, in combination, a piston,'apiston chamber, a by-pass chamber through which the liquid passes during the advancing movement of the piston, and a rotatable valve adapted to be adjusted by turning it less than 360 degrees to either increase or diminish the rate of flow of the liquid said ports compristhrough said by-pass chamber at a plurality V of predetermined points in the advancing movement of the piston.

7 A door check having, in combination, a piston, a piston chamber, a valve chamber having three ports, one in communication with the piston chamber at the rear of the piston, and the other two in communication with the piston chamber in front of the piston when, the piston is in retracted position, and a single valve for controlling all of said ports with relation to each other.

8. A door check having, in combination, a piston, a piston chamber, a valve chamber having three ports, one in communication with the piston chamber at the rear of the piston, and the other two in communication with the piston chamber in front of the piston when the piston is in retracted position, and a longitudinally fixed rotatable valve member for controlling all of said ports with relation to each other.

9. A door check having, in combination, a piston, a casing having a piston chamber, and a by-pass chamber having an outlet port leading intothe piston chamber at the into said by-pass chamber having its inner end closed and having three ports in alinement with said ports, respectively, in said by-pass chamber, the rearmost port being also in communication with said outlet port of the by-pass'chamber, and'a tubular valve member mounted to turn in said bushing for controlling all of said ports. a

10. A door check having, in combination, a piston, a casing having a'piston-chamber,

advance of the piston when the piston is inretracted position, a bushing arranged within said by-pass chamber having its inner'end closed and having a plurality of ports in alinement with said ports, respectively, in said by-pass chamber, the rearmost port being also in connnunication with said outlet port of the by-pass chamber, and a valve mounted to turn in said bushing fOlCOIltrolling all of said ports.

In testimony whereof, I have signed my name to thisspecification this 28th day of September, 1926.

GEORGE HENRY WUCHERT. 

